Surströmming is expensive because it depends on a single species of fish from a single body of water, requires months of careful fermentation, and faces tightening supply constraints from fishing quotas and environmental regulations. A single can typically costs $20 to $40 outside of Sweden, and prices climb higher for international shipping due to the pressurized, bulging cans that many carriers refuse to transport. Several forces push the price up simultaneously, and none of them are likely to ease anytime soon.
Baltic Herring Supply Is Shrinking
Surströmming is made exclusively from Baltic herring, and the health of those stocks directly controls how much can be produced. Several key herring populations in the Baltic Sea are in trouble. The western Baltic spring-spawning stock has fallen below its lowest safe biological limit, with recruitment and catches described as “very low” by the International Council for the Exploration of the Sea (ICES). Central Baltic herring has spent years below what scientists consider a sustainable spawning level, though it recently showed some recovery. In the Gulf of Riga, the recommended catch quota for 2025 dropped from about 45,200 tonnes to roughly 34,400 tonnes, a decline of nearly 24% in a single year.
These aren’t abstract numbers for surströmming producers. Less herring in the water means less herring available for fermentation, and every producer is competing with the much larger market for fresh and frozen herring products. When quotas tighten, the raw material gets more expensive before fermentation even begins.
A Months-Long Fermentation Process
Making surströmming is not like canning regular fish. The process is slow, seasonal, and labor-intensive. By tradition (and under a longstanding Swedish royal ordinance), the herring must be caught between April and July, before spawning. That gives producers a narrow window to secure their entire year’s supply of raw fish.
Once caught, the herring goes through a one- to two-day presalting step in a saturated salt solution. Workers then gut each fish by hand, removing the heads and entrails while carefully leaving the roe and certain digestive organs intact, as these contribute to the characteristic flavor. The prepared herring is packed into large barrels holding about 200 pounds of fish, submerged in a weak brine at around 17% salt concentration, and left to ferment for anywhere from three weeks to three months at controlled temperatures between 15 and 18°C. During the early phase, the barrels need to be rotated periodically.
After barrel fermentation, the herring and brine are transferred into individual cans where fermentation continues. The cans are sealed but not sterilized, so the bacteria inside keep working, producing gases that cause the distinctive bulge on the top and bottom of each can. This ongoing fermentation is what gives surströmming its intense smell and flavor, but it also means the product is alive in a way that most canned goods are not. The entire process from catch to shelf-ready product takes several months, tying up facilities, ingredients, and labor for far longer than conventional canning operations.
EU Regulations Limit the Market
Baltic herring accumulates dioxins and PCBs from the polluted waters of the Baltic Sea, and the European Union sets strict maximum levels for these contaminants in fish sold for human consumption. Most Baltic herring, particularly larger and fattier specimens, exceeds those limits. This effectively bans the sale of many Baltic herring products across most of the EU.
Sweden, Finland, and Latvia have permanent exemptions allowing them to sell Baltic herring (and salmon) with higher contaminant levels on their domestic markets, but only within their own borders and only with consumer health warnings in place. These countries are required to ensure that non-compliant fish products are not marketed to other EU member states. For surströmming producers, this creates a regulatory ceiling on their potential customer base. They can sell freely in Sweden, but exporting within Europe means navigating contaminant thresholds that their product may not meet. This limits the economies of scale that could otherwise bring prices down.
Fishing Quotas Shift Year to Year
EU fishing quotas for the Baltic Sea are renegotiated annually, and the numbers swing dramatically depending on stock assessments. For 2025, the EU Council increased the central Baltic herring quota by 108% after the stock showed improvement, and Gulf of Bothnia herring went up 21%. But western Baltic herring remained locked at minimal bycatch-only levels because the population is too depleted for any directed fishing.
This volatility makes it difficult for surströmming producers to plan. A good quota year doesn’t guarantee the next one will be equally generous, and a bad year can force producers to scale back or pay premium prices for their raw herring allocation. Small-scale coastal fisheries, which supply much of the herring used for surströmming, do benefit from a maintained exemption that keeps them operational. But these are inherently low-volume operations, which keeps production artisanal rather than industrial.
Shipping Costs Add a Significant Markup
The bulging cans that define surströmming are a nightmare for shipping logistics. The pressurized containers are classified as potentially hazardous by many airlines, and several major carriers ban them outright. Even ground shipping requires special handling, since a ruptured can of surströmming in a warehouse or delivery truck is a genuinely serious problem for everyone nearby. Retailers outside Scandinavia who stock surströmming typically import it through specialty distributors, each adding their own margin. By the time a can reaches North America or Asia, the shipping and handling costs can rival or exceed the cost of the product itself.
A Tiny Producer Base Serves a Niche Market
Only a handful of producers in northern Sweden make surströmming commercially. The largest operations are concentrated around the High Coast region, where the tradition runs deepest. There is no global industry competing to drive prices down through efficiency. Each producer works with seasonal fish, traditional methods, and limited facilities. The customer base is largely Swedish, with a smaller international audience driven by curiosity or cultural connection. Without mass-market demand, there is no incentive to industrialize, and without industrialization, per-unit costs stay high.
The combination is what makes surströmming uniquely expensive: a shrinking supply of raw fish, a production process that takes months and resists shortcuts, regulations that cap the export market, unpredictable annual quotas, costly shipping for a pressurized product, and a small number of artisanal producers with no reason to scale up. Each factor alone would nudge the price upward. Together, they make a $30 can of fermented herring surprisingly rational.